Why is the finger print scanner reading out my bad swipes?

I am on the Galaxy Note 4. I am currently a student which means when I use my phone, the more discretion, the better. I set up the finger print scanner so I can swipe my thumb. Whenever I swipe and it is off a bit there is a small animation as most android users have seen that says essentially to swipe again. Since I set it up this time, it has also been saying it out loud. Anyone know how to disable it saying it out loud?
Tl;dr Make the scanner quiet